Blood donation pin.
**Catching up on 3/3/13**
I think I received this pin after donating blood in Toronto with my friend Dan. We were on a cross-country trip back in 1994 and we decided that international blood donation would be a kind way to interact with our neighbors up north. I never received my blood donor card (Dan did), but had this pin as a reminder.
I found this in the same box as Thing 257.